Physical properties of MnSi at extreme doping with Co: Quantum criticality

The samples of (Mn$_{1-x}$Co$_x$)Si with $x=0.15$ and $x=0.17$ were grown their physical properties: magnetization magnetic susceptibility, resistivity heat capacity studied. data analysis included also the previous results at $x=0.057, 0.063, 0.09$. indicated doping MnSi Co completely destroys helical phase transition whereas basically saves fluctuation area normally situated slightly above temperature. This spreading from $\sim$5 to 0 K is not changed much forms some sort cloud revealing quantum critical $C_p/T\rightarrow\infty$ $T\rightarrow0$.